Smartwatches could predict smoking cravings before they start

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

* INCLUSION CRITERIA: We will recruit up to 30 non-treatment seeking participants with low socioeconomic status who smoke. We will strive to have representation across racial and ethnic groups and biological sex. At least half of the participants must earn at or below 200% of the federal poverty guideline for 2024 corresponding to number of people in their household (US Department of Health and Human Services). To be included in the study, participants must: * be 21 years or older in compliance with Tobacco 21 laws * have no college degree or be currently enrolled in college * have smoked 100 cigarettes in their lifetime and 5+ cigarettes per day in the past year to establish daily smoking status * willing to abstain from smoking for \>=12 hours prior to the lab visit verifiable by a CO reading that is below 10 ppm and retrospectively by minimal nicotine in blood sample * willing to abstain from using any nicotine products or devices for \>=12 hours prior to the lab visit * willing to abstain from alcohol use for \>=12 hours prior to the lab session verifiable by breath alcohol concentration (BrAC = 0.000) * willing to adhere to all study procedures including agreeing to a blood draw and bringing \>=1cigarette for use during the study visit * have a smartphone compatible with wearable device requirements for Bluetooth and operating system (iphone iOS 14 and higher, Android 9.0 and higher) and willing to download the study apps onto their phone * speak English * and willing and able to provide informed consent. EXCLUSION CRITERIA: Participants will be excluded if they: * are not abstinent before the lab session through biochemical verification after two attempts * have sought treatment for tobacco/nicotine use in the past 2 months (e.g., on pharmacotherapy for smoking cessation, enrolled in smoking cessation support programs or interventions) * have past 3-month pulmonary or cardiovascular event, or those who have been hospitalized or visited the emergency room for seizure, stroke, or new heart problems, * are pregnant or breastfeeding * and are unable or unwilling to provide informed consent. Vulnerable populations will not be enrolled in the study (i.e., adults unable to consent, individuals who are not yet adults, pregnant women, prisoners).